A busy London street became a scene of horror over the weekend.BBC News reports Dave Fawbert spotted the boa constrictor in Leytonstone.The snake was "100 percent eating the pigeon. It had its jaw open wrapped around it and the head was half-way in already," Fawbert said.He commented that he had hoped to see a snake when he visited Tanzania a few years ago. "I never did, but I guess now I have," he said. A picture Fawbert posted on Twitter has been shared more than 6,000 times. "I wasn't scared because it was moving so slowly and it was completely wrapped up in its pigeon. It was just trying to eat the pigeon. It wasn't taking any notice of all the people," witness Richard Garland said. The Royal Society for the Prevention of Cruelty to Animals took the snake to a wildlife center and is asking members of the public for details on how the reptile got onto the street.A spokeswoman for the RSPCA said it appeared "someone had found a dead pigeon and then given it to the snake."

The snake was "100 percent eating the pigeon. It had its jaw open wrapped around it and the head was half-way in already," Fawbert said.

He commented that he had hoped to see a snake when he visited Tanzania a few years ago.

"I never did, but I guess now I have," he said.

A picture Fawbert posted on Twitter has been shared more than 6,000 times.

"I wasn't scared because it was moving so slowly and it was completely wrapped up in its pigeon. It was just trying to eat the pigeon. It wasn't taking any notice of all the people," witness Richard Garland said.

The Royal Society for the Prevention of Cruelty to Animals took the snake to a wildlife center and is asking members of the public for details on how the reptile got onto the street.

A spokeswoman for the RSPCA said it appeared "someone had found a dead pigeon and then given it to the snake."